High · published April 3, 2024
In the Linux kernel, the following vulnerability has been resolved:
net/sched: act_mirred: don't override retval if we already lost the skb
If we're redirecting the skb, and haven't called tcf_mirred_forward(),
yet, we need to tell the core to drop the skb by setting the retcode
to SHOT. If we have called tcf_mirred_forward(), however, the skb
is out of our hands and returning SHOT will lead to UaF.
Move the retval override to the error path which actually need it.
| Product | Versions | Fixed in |
|---|---|---|
| debian/debian_linux | all versions | — |
| linux/linux_kernel | ≥ 4.19, < 5.10.238 | 5.10.238 |
| linux/linux_kernel | ≥ 5.11, < 5.15.182 | 5.15.182 |
| linux/linux_kernel | ≥ 5.16, < 6.1.136 | 6.1.136 |
| linux/linux_kernel | ≥ 6.2, < 6.6.19 | 6.6.19 |
| linux/linux_kernel | ≥ 6.7, < 6.7.7 | 6.7.7 |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |